JP5901536B2 - Metal tube supply method - Google Patents

Description

  The present invention supplies a metal pipe from a level wound coil in which long metal pipes made of copper or copper alloy used as heat transfer pipes for air conditioning refrigerators such as air conditioners and hot water / water supply pipes for buildings are aligned and wound. It relates to a supply method.

  A level-wound coil (hereinafter referred to as LWC) is a cylindrical coil body in which a long metal tube made of copper or copper alloy or the like is traverse-wound and aligned and wound in multiple layers in the radial direction. Yes, it is used for transporting long metal pipes in the manufacturing process such as heat transfer pipes, hot water supply / water supply pipes or after manufacture.

  For example, as shown in FIG. 13, when the LWC 10 is wound around the central axis CL from the lower surface level DL of the innermost layer Lf toward the upper surface level UL of the innermost layer Lf without a gap in sequence, and reaches the upper surface level UL, It folds toward the lower surface level DL, and is sequentially wound in a line without a gap so as to fit into the concave portion 4 on the outer radius R side between the copper tubes 11 of the innermost layer Lf.

  Further, when reaching the lower surface level DL, it is folded back toward the upper surface level UL, and sequentially wound in a line without gaps so as to fit into the concave portion 4 on the radially outward R side between the copper tubes 11 wound toward the lower surface level DL. . By repeating this a predetermined number of times toward the radially outward direction R, it is possible to configure the LWC 10 that is a cylindrical coil wound in multiple layers in the radial direction.

  Note that, in the LWC 10 that is wound from the innermost layer Lf toward the outermost layer La, the copper tube 11 of the outermost layer La of the LWC 10 has an upper surface level UL as shown in FIG. In some cases, the tube end 11a of the outermost layer La wound from the lower surface level DL to the lower surface level DL may not reach the lower surface level DL.

  As one of the methods of unwinding the copper tube 11 from the LWC 10 configured in such a coil shape and supplying the metal tube, for example, as shown in Patent Document 1, the central axis CL of the coil body is set in the vertical direction. The LWC 10 is placed, and the tube ends 11u and 11d arranged at the upper surface level UL or the lower surface level DL in the innermost layer Lf of the LWC 10 are used as the unwinding start ends, and the LWC 10 is sequentially moved upward from the innermost layer Lf to the outermost layer La. There is a method of unwinding and supplying the copper tube 11.

  However, in the method of unwinding the copper tube 11 from the innermost layer Lf to the outermost layer La, as described above, when the tube end 11a of the outermost layer La does not reach the lower surface level DL, the inner layer of the outermost layer La is wound. The copper tube 11 of the outermost layer La is loosened by being unwound, and the copper tube 11 wound around the outermost layer La slides downward as shown by an arrow I in FIG. 13 and the surface of the copper tube 11 is damaged. Or bends.

  In order to prevent the occurrence of such a defect, the copper tube 11 wound halfway in the height direction in the outermost layer La of the LWC 10 is cut at least at the upper surface level UL of the layer one inner side from the outermost layer La. Therefore, the yield was reduced.

  As a method of avoiding such a problem, a method of unwinding the copper tube 11 from the outermost layer La to the innermost layer Lf as opposed to a method of unwinding the copper tube 11 from the innermost layer Lf of the LWC 10 toward the outermost layer La. Is assumed.

  In the method of unwinding the copper tube 11 from the outermost layer La toward the innermost layer Lf, the tube end 11a of the outermost layer La is unwound from the upper surface level UL of the LWC 10 to the lower surface level DL. Therefore, it is not necessary to cut the copper pipe 11 which is a fraction in the outermost layer La as described above, and the yield does not decrease.

  However, in the above-described method of unwinding the copper tube 11 from the outermost layer La to the innermost layer Lf of the LWC 10, the copper tube 11 unwound from the outer surface 10b of the LWC 10 is guided toward the upper side of the LWC 10. A force from the outside of the LWC 10 toward the central axis CL acts on the unwound copper tube 11.

  Thus, when the force which goes to the center axis | shaft CL from the outer side of LWC10 acts, the unrolled copper pipe 11 winds up the outer surface 10b of LWC10, and the above-mentioned to the copper pipe 11 by the outer surface 10b is tightened There was a risk that a defect occurred and the yield was significantly reduced. Furthermore, unwinding is interrupted by winding the outer surface 10b of the LWC 10 with the unrolled copper tube 11, and thus production efficiency may be deteriorated.

JP 2002-370869 A

  Therefore, the present invention prevents a metal tube from being unwound when the metal tube is unwound from the outermost layer of the LWC toward the innermost layer, and can smoothly supply the metal tube from the LWC. An object is to provide a pipe supply method.

ThisAccording to the present invention, a level wound coil obtained by traverse winding and aligning winding a metal tube is placed so that the axial direction of the coil body is a vertical direction, and the coil body is placed at a central position above the upper surface of the level wound coil. A position-fixing body whose position is fixed with respect to the coil, and a guide that allows the insertion of the metal tube is disposed at a position above the position-fixing body and inside the level-wound coil in a plan view. And unwinding the metal tube from the outermost layer toward the upper side and supplying the metal tube from the level-wound coil through the guide In the lifting portion where the metal tube is unwound and pulled up, From the unwinding start position where the metal tube is unwound from the outer surface of the wind coil, A tube surrounding the gap between the center and the outside of the level wound coil before unwinding. The interval in the width direction to the periphery is set as the interval in the coil width direction, and the level wound coil The vertical spacing from the bottom of the guide to the lower end of the guide is the coil bottom vertical spacing, The tube is formed with a predetermined thickness, and the coil width direction interval, and And a length equal to or longer than the hypotenuse of a right triangle with the vertical distance between the coil bottoms perpendicular to each other. The upper end of the tube is pivotally connected to the lower end of the guide via a bearing, and the tube The lower end of is arranged in the vicinity of the unwinding start positionIt is a metal tube supply method.

  The metal pipe is, for example, a heat transfer pipe of an air conditioner refrigerator such as an air conditioner and a hot water supply / water supply pipe of a building. As well as long metal tubes made of copper or copper alloys, such as aluminum and This is a concept including a long metal tube made of an appropriate metal such as an aluminum alloy.

  The metal pipe is wound around the level-wound coil (hereinafter referred to as LWC). It is a concept that includes both a coiled body or a coil with a winding bobbin. In addition, the guide disposed above the LWC is a guide disposed above the central axis of the LWC. Id.

The position fixing body fixed to the coil body at a central position above the upper surface of the level-wound coil is mounted on the LWC, and is a position fixing body protruding continuously from the upper surface of the LWC. It is possible to provide a position fixing body that extends at least from the center of the LWC in the radial direction, including a position fixing body that protrudes from the upper surface with a gap.

  The position fixing body is preferably made of a material having a friction coefficient smaller than at least the friction coefficient between the metal tubes, and can be made of, for example, cardboard or plastic such as polyethylene, vinyl chloride, or fluororesin.

  The tube has a small coefficient of friction against the metal tube and the position fixing body, for example, polyethylene. Made of plastic such as len, vinyl chloride or fluororesin and having a specified thickness. It can consist of tubes.

According to the present invention, when the metal tube is unwound from the outermost layer of the LWC toward the innermost layer, it is possible to prevent the metal tube from being unwound and to smoothly supply the metal tube from the LWC.
More specifically, by installing a position fixing body fixed to the coil body at a central position above the upper surface of the level wound coil, winding is performed from the outermost layer upward to the level wound coil. The metal tube which is unwound and supplied through a guide disposed above the position fixing body and inside the planar view of the level wound coil is guided radially outward by the position fixing body.

  That is, by being guided directly upward of the LWC, the unwinding metal tube is prevented from acting on the central axis from the outside of the LWC, and the unrolled metal tube is It is possible to avoid tightening the outer surface of the LWC.

  Accordingly, it is possible to avoid the occurrence of defects such as breakage, bending, deformation and scratching of the metal tube due to the load acting on the metal tube by winding and tightening, and the yield and production efficiency of the metal tube are greatly improved. be able to.

Further, in the lifting portion where the metal tube is unwound and pulled up, the level is From the unwinding start position where the metal tube is unwound from the outer surface of the lewound coil, the guide Between the metal tube and the position fixing body. Since the tube is interposed between the metal tube and the side surface of the position fixing body, It is possible to avoid scratching the metal tube surface due to friction.

In addition, the distance in the width direction from the center of the level wound coil to the outer periphery before unwinding is set. The interval in the coil width direction and the bottom of the level wound coil The vertical distance to the end is the coil bottom vertical distance, and the tube is Are formed with a predetermined thickness, and the coil width direction interval and the coil bottom direction interval Are formed in a length equal to or longer than the hypotenuse of a right triangle, and the upper end of the tube is connected to the guide. The lower end of the tube is rotatably connected via a bearing, and the lower end of the tube is unwound and unrolled. By placing it in the vicinity of the starting position, it is about to come off radially outward from the outer surface of the LWC. The unwinding start position of the metal tube and the relative position of the tube with respect to the position fixing body The metal tube can be smoothly guided to the guide.

Further, the tube is orthogonal to the coil width direction interval and the coil bottom direction interval. The length of the tube that is longer than the hypotenuse of the right triangle Even when the lower end of the outermost layer of the LWC before long unwinding is the starting end of unwinding, The metal tube can be smoothly guided to the guide.

Further, the lower end of the tube is wound by the metal tube from the outer surface of the level wound coil. The metal tube is placed on the outer surface of the LWC in order to be placed near the unwinding start position to be unwound. Can be easily removed radially outward.

Specifically, in the layer unwinding the metal tube from the lower surface level to the upper surface level, When there is no gap between the mounting surface of the LWC or the lower flange and the metal tube at the lowest end of the layer The lowermost part sandwiched between the metal tube located on the lowermost metal tube and the mounting surface or the lower flange It becomes difficult to remove the metal tube at the end from the outermost layer of the LWC.

However, even in such a case, the lower end of the tube is placed at the unwinding start position. By guiding the metal tube to the outside of the wall thickness of the tube, the metal tube is Easily escape from the outermost layer of the WC to the outside of the diameter.
  Therefore, the metal tube on the outer surface of the LWC is in contact with the unrolled metal tube. And it can avoid more reliably that the said defect arises in the said metal pipe.

Further, when unwinding the metal tube upward from the LWC, the tube is placed in the coil. It is possible to prevent the tube from being twisted by turning around the mandrel. Therefore Thus, the metal tube can be stably guided to the guide by the tube.

As an aspect of the present invention, the position fixing body can be constituted by a columnar body that is mounted in the inner circumferential space of the level wound coil.
The columnar body can be a columnar shape, a cylindrical shape, a polygonal columnar shape, or a polygonal cylindrical shape. In the case of a polygonal columnar shape or a polygonal cylindrical shape, the columnar body has a substantially polygonal columnar shape or a substantially polygonal cylindrical shape with chamfered corners. Is preferred. Furthermore, the part exposed to the upper part of a coil body can be made into the columnar body formed in the inverted truncated cone or the inverted polygon frustum.

  According to the present invention, when the metal tube is unwound from the outermost layer of the LWC toward the innermost layer, it is possible to further prevent the tightening by the unwound metal tube, and to supply the metal tube more smoothly from the LWC.

  Specifically, the position fixing body is configured by a columnar body that is mounted in the inner circumferential space of the level wound coil, so that the position fixing body continuously protrudes from the upper surface of the LWC, and the unrolled metal tube has a columnar shape. Since it is unwound from the outermost layer along the side surface of the body toward the upper side of the level wound coil, it is possible to suppress the action of the force toward the central axis from the outside of the LWC acting on the unwound metal tube. The unwound metal tube can be prevented from winding the outer surface of the LWC.

As an aspect of the present invention, the columnar body can be formed in a cylindrical shape along the inner peripheral surface of the inner peripheral space.
According to the present invention, when unwinding the metal tube from the outermost layer of the LWC to the innermost layer, it is possible to more reliably prevent unwinding of the unwound metal tube and supply the metal tube more smoothly from the LWC. it can.
Specifically, by configuring the position fixing body in a cylindrical shape, it can be mounted along the inner peripheral surface of the inner peripheral space of the LWC, so that the mounting state is stabilized. The unrolled metal tube is unwound from the outermost layer toward the upper side of the level wound coil along the side peripheral surface of the cylindrical body. Therefore, it can suppress that the force which goes to the center axis | shaft from the outer side of LWC acts on the metal tube currently unwound, and it can avoid that the said metal tube being unwound tightens the outer surface of the said LWC.
In addition, by configuring the position fixing body with a cylindrical body, the position fixing body is lighter than the position fixing body configured with a solid columnar body, and the handleability is improved.

As an aspect of the present invention, a flange that protrudes radially outward along the outer peripheral surface can be provided near the upper end of the columnar body.
The collar part may be made of the same material as the columnar body or a different material, and the collar part and the columnar body may be configured integrally or separately, but the collar part is at least the metal tube. A material having a friction coefficient smaller than the friction coefficient between them is preferable. For example, it can be made of cardboard or plastic such as polyethylene, vinyl chloride, or fluororesin.

  According to the present invention, the outermost periphery of the position fixing body can be formed larger than the inner peripheral diameter of the LWC to which the position fixing body is mounted by the collar portion, and is unwound from the outermost layer toward the upper side of the level wound coil. The metal tube supplied through a guide disposed above the position fixing body and inside the planar view of the level wound coil can be further guided radially outward. Therefore, when the metal tube is unwound from the outermost layer of the LWC toward the innermost layer, it is possible to more reliably prevent the tightening by the unwound metal tube, and to smoothly supply the metal tube from the LWC. In particular, even when the unwinding of the metal tube is advanced and the diameter of the LWC is reduced, the unwinding of the unwound metal tube can be more reliably prevented, and the metal tube can be smoothly supplied from the LWC.

  Further, as an aspect of the present invention, the interval in the width direction from the center of the position fixing body to the outer peripheral edge is set as the interval in the width direction of the fixing body, and the interval in the vertical direction from the position fixing body to the lower end of the guide is fixed. The distance between the fixed body width direction and the fixed body width direction interval can be set to 2 or less.

  Thereby, regardless of the interval in the vertical direction of the fixed body, the position fixing body is allowed to act on the metal tube to be unwound, so that the metal tube can be reliably guided radially outward and the metal tube can be smoothly supplied from the LWC. .

  Specifically, when the ratio of the fixed body width direction interval to the fixed body vertical direction interval is 2 or more, the metal tube to be unwound is not in contact with the position fixing body, and the metal tube is sufficiently guided radially outward. May not be able to occur and tightening may occur due to the unrolled metal tube. On the other hand, by setting the ratio of the fixed body width direction interval to the fixed body vertical direction interval to 2 or less, that is, the inclination angle connecting the lower end of the guide and the outer peripheral edge of the position fixed body is 45 degrees or more. Therefore, a position fixing body is made to act on the metal tube to be unwound, so that the metal tube can be surely guided to the outside of the diameter, and the metal tube can be smoothly supplied from the LWC.

  Also, as an aspect of the present invention, the interval in the width direction from the center of the level wound coil to the outer peripheral edge before unwinding is defined as the coil width direction interval, and the vertical direction from the upper surface of the level wound coil to the lower end of the guide Is the coil vertical direction interval, and the ratio of the coil width direction interval to the coil vertical direction interval can be 4 or less.

  Thereby, regardless of the vertical spacing of the coil, the position fixing body is allowed to act on the metal tube to be unwound, and the metal tube can be reliably guided radially outward, and the metal tube can be smoothly supplied from the LWC.

  Specifically, when the ratio of the coil width direction interval to the coil vertical direction interval is 4 or more, in the state before unwinding, the inclination angle connecting the lower end of the guide and the outermost layer of the LWC is the inclination closest to the horizontal direction. There is a case where the metal tube to be unwound does not come into contact with the position fixing body, and the metal tube cannot be sufficiently guided outward in the diameter, and winding by the unrolled metal tube may occur. On the other hand, by setting the ratio of the coil width direction interval to the coil vertical direction interval to 4 or less, the position fixing body is made to act on the metal tube to be unwound, and the metal tube is reliably guided radially outward. The metal tube can be supplied smoothly from

As an aspect of the present invention, the vertical interval from the upper surface of the level wound coil to the lower end of the guide can be set to 500 mm or more and 2000 mm or less.
According to the present invention, when unwinding the metal tube from the outermost layer of the LWC to the innermost layer, it is possible to more reliably prevent unwinding of the unwound metal tube and supply the metal tube more smoothly from the LWC. it can.

Specifically, when the vertical distance from the upper surface of the LWC to the lower end of the guide is short, a force toward the radially outer side of the unwound metal tube becomes strong, and the metal tube is easily separated from the coil. Therefore, when unrolling the metal tube, the metal tube is not wound, and defects such as scratches and bending do not occur. Further, curling flaws are uniformly generated and easily disappear, and the surface of the metal tube is not damaged by rubbing against the guide.
On the other hand, when the vertical distance from the upper surface of the LWC to the lower end of the guide is too short, which is 500 mm or less, the metal tube is excessively bent and is difficult to unwind.

  On the other hand, if the length of the metal tube is 2000 mm or more which is too long from the upper surface of the LWC to the lower end of the guide, the length of the unrolled metal tube becomes longer, and the tensile force required to unwind the metal tube increases. In addition, there is a high possibility that defects such as bending will occur in the metal tube, and curling will easily occur.

  On the other hand, by setting the vertical distance from the upper surface of the LWC to the lower end of the guide, that is, the height of the guide with respect to the upper surface of the LWC within the above range, which is an appropriate height, When unwinding the metal tube from the outer layer toward the innermost layer, it is possible to more reliably prevent unwinding of the unwound metal tube and supply the metal tube more smoothly from the LWC.

  According to this invention, when unwinding a metal tube from the outermost layer of the LWC to the innermost layer, the metal tube supply that prevents the unwinding of the unwound metal tube and can smoothly supply the metal tube from the LWC A method can be provided.

The perspective explanatory drawing of LWC. The longitudinal cross-sectional explanatory drawing which shows the method of winding a copper pipe from the innermost layer. The longitudinal cross-sectional explanatory drawing which shows the method of unwinding a copper pipe from outermost layer. The perspective view which shows the unwinding method using a protection pipe with a brazing. The cross-sectional schematic about the unwinding method using a protection pipe with a brazing. The expanded sectional view of the connection part of a guide and a tube. The perspective explanatory drawing which shows a mode that it is unwinding in the unwinding method using a brazed protect pipe. The perspective view which shows the unwinding method using a protect pipe. The cross-sectional schematic about the unwinding method using a protect pipe. The perspective explanatory view of an upper surface flange cover. The perspective view which shows the unwinding method using an upper surface flange cover. Explanatory perspective drawing which shows a mode that it is unwinding in the unwinding method using an upper surface flange cover. Explanatory drawing which shows the slipping of the outermost metal tube in a prior art example.

Embodiments of the present invention will be described below with reference to the drawings.
First, the LWC 10 unrolled by the unwinding method of the present embodiment will be described with reference to FIGS.

  FIG. 1 is a perspective view of the LWC 10 of the present embodiment, and FIGS. 2 and 3 are schematic longitudinal sectional views showing an enlarged part of the LWC 10 including the central axis CL and the tube end 11a of the outermost layer La in FIG. 2 shows the winding method, and FIG. 3 shows the unwinding method.

  The LWC 10 is a coil in which a long copper tube 11 shown in FIG. 1 is traverse-wound and aligned and wound in multiple layers, and the long copper tube 11 is transported after a manufacturing process such as a heat transfer tube, hot water supply / water supply piping, or after manufacturing. It is used to

As shown in FIG. 2, the LWC 10 is obtained by winding a long copper tube 11 from the innermost layer Lf closest to the central axis CL of the LWC 10 toward the outermost layer La.
More specifically, the copper tube 11 starts to be wound from the upper end portion 11u (or from the lower end portion 11d) of the innermost layer Lf along the outer periphery of the winding body of the winding bobbin (not shown), and from the upper surface level UL. Wind sequentially in a line toward the lower surface level DL without any gaps. If it winds to the lower end part 11d, it will return | fold and will wind around the same number of times as the innermost layer Lf so that the copper tube 11 may fit in the recessed part 4 between the copper tubes 11 of the innermost layer Lf. Thereafter, similarly, the long copper tube 11 is wound a predetermined number of times along the winding order X1 and removed from a winding bobbin (not shown) to obtain the LWC 10.

  In this embodiment, the LWC 10 is formed by winding a copper tube 11 having a diameter of 7 mm and forming a coil height h1 of 350 mm, a coil outer diameter OD1 of 1000 mm, and a coil inner diameter ID1 of 600 mm, but is not limited thereto. They may be formed in an appropriate size. For example, the coil height h1 may be 0 to 500 mm, the coil outer diameter OD1 may be 500 to 1500 mm, and the coil inner diameter ID1 may be 300 to 800 mm. Further, the cylindrical space on the inner peripheral side formed by the coil inner diameter ID1 is taken as an inner peripheral space S after being removed from the winding drum of the winding bobbin (not shown).

  In FIG. 2, the winding of the LWC 10 is illustrated such that the axial direction of the central axis CL of the LWC 10 is the vertical direction. However, when the copper tube 11 is actually wound, the axial direction of the central axis CL is horizontal. It may be a direction.

  Further, as shown in FIG. 2, the LWC 10 is wound from the lower surface level DL toward the upper surface level UL in the outermost layer La depending on the length of the copper tube 11 and the winding method. The tube 11 may finish winding.

  In winding, a winding bobbin with an upper flange and a lower flange (not shown) is used. After winding, the winding bobbin is removed from the LWC 10 and only the LWC 10 is transported to the next manufacturing process. To do.

In the next manufacturing process, in the present invention, the copper tube 11 is unwound and supplied from the outermost layer La of the LWC 10. In this method, as shown in FIG. 3, the axial direction of the central axis CL is set to the vertical direction so that the upper end portion 11u during winding is the lower end portion 11d and the lower end portion 11d during winding is the upper end portion 11u. Then, the LWC 10 is placed upside down, and the copper tube 11 is sequentially unwound along the unwinding sequence X2 from the tube end 11a of the outermost layer La toward the innermost layer Lf, contrary to the case of winding described above.
Further, as will be described later, the copper tube 11 is once moved in the direction of the arrow B attached to the tube end 11a, that is, radially outward, and then unwound to the upper portion of the central axis CL of the LWC 10.

  Such a supply method will be described in detail below in conjunction with FIGS. 4 is a perspective view showing an unwinding method using the brazed protect pipe 20, and FIG. 5 is a schematic cross-sectional view of the unwinding method using the brazed protect pipe 20. 6 shows an enlarged cross-sectional view of a connecting portion between the guide 16 and the tube 18, and FIG. 7 shows a perspective explanatory view of the state where the guide 16 and the tube 18 are unwound in the unwinding method using the brazed protect pipe 20.

  In the method of unwinding the copper tube 11 from the outermost layer La of the LWC 10, before unwinding the copper tube 11, first, as shown in FIG. 4, the disk-shaped plate placed on the pallet 24 placed horizontally is firstly formed. The LWC 10 is placed on the buffer plate 23 so that the center axis CL23 of the buffer plate 23 and the center axis CL of the LWC 10 coincide with each other.

  Next, the flanged protect pipe 20 is attached to the LWC 10. The flanged protect pipe 20 includes a cylindrical protect pipe body 21 and a flange ring 22 provided at the upper end of the protect pipe body 21. The protect pipe body 21 has the same pipe outer diameter OD2 as the coil inner diameter ID1 (see FIG. 1) of the LWC 10, and has a cylinder height h2 that is approximately twice as small as the coil height h1 of the LWC 10. It is composed of a cardboard cylindrical body whose friction coefficient is smaller than the friction coefficient between tubes.

  Specifically, the protect pipe main body 21 has a tube height h2 with respect to the LWC 10 in which the copper tube 11 having a diameter of 7 mm is wound, the coil height h1 is 350 mm, the coil outer diameter OD1 is 1000 mm, and the coil inner diameter ID1 is 600 mm. Is 600 mm and the pipe outer diameter OD2 is 595 mm. Therefore, the coil width direction interval OR1 corresponding to the coil radius is 500 mm, and the pipe width direction interval OR2 corresponding to the pipe radius is 300 mm.

  By completely fitting the protect pipe main body 21 into the inner circumferential space S along the inner side surface 10a of the LWC 10, the protect pipe main body 21 protrudes 250 mm (projection height h3) from the coil upper surface 10U of the LWC 10. It becomes. The cylinder height h2 of the protect pipe main body 21 is set to 600 mm. However, the present invention is not limited to this, and the protrusion height h3 is 0.2 to 1.2 times the coil inner diameter ID1 and 0 of the coil outer diameter OD1. The cylinder height h2 may be set within a range of 1 to 0.8 times.

The eaves ring 22 is a ring body having a semi-circular shape in a single cross section that is arranged so as to protrude radially outward at the upper end of the protect pipe main body 21, and the inner peripheral surface is arranged along the upper end of the protect pipe main body 21. doing.
In addition, the collar ring 22 is comprised with resin with a smaller friction coefficient than the friction coefficient of metal pipes.

  In this way, the LWC 10 placed on the pallet 24 and fitted with the hooked protect pipe 20 is made of plastic provided to eliminate the curl of the pulled up copper tube 11 as shown in FIG. The pipe-shaped guide 16 is disposed at a predetermined position described below.

  First, in the upper part of the central axis CL of the LWC 10, the LWC 10 is installed so that the first vertical interval H1 that is the vertical interval from the upper surface level UL of the LWC 10 to the guide lower end 16a of the guide 16 is 500 mm to 2000 mm. .

  Further, the distance in the width direction from the center of the protect pipe main body 21 to the outer peripheral edge of the guard pipe 20 with the flange, that is, the radius of the protect pipe main body 21 is set to the pipe width direction interval OR2, and the guide 16 The vertical interval to the guide lower end 16a is defined as a second vertical interval H2, and the ratio of the pipe width direction interval OR2 to the second vertical interval H2 is 2 or less.

Further, the distance in the width direction from the central axis CL to the outer peripheral edge of the LWC 10 before unwinding, that is, the radius before unwinding in the LWC 10 is defined as the coil width direction interval OR1, and the coil width direction interval OR1 with respect to the first vertical direction interval H1. The ratio is set to 4 or less.
In this embodiment, the coil width direction interval OR1 is 500 mm, the pipe width direction interval OR2 is 300 mm, the first vertical direction interval H1 is 1500 mm, and the second vertical direction interval H2 is 1250 mm.

Further, a tube 18 that allows insertion of the unwound copper tube 11 is connected to the guide lower end 16 a of the guide 16.
In addition, as shown in FIG. 6, the tube 18 is connected to the guide 16 by connecting the tube upper end 18a of the plastic tube 18 having a small coefficient of friction with the copper tube 11 via the bearing 17 to the guide lower end 16a of the guide 16. It is connected so that it can rotate freely.

  Further, as shown in FIG. 4, the length of the tube 18 is adjusted so that the tube lower end 18 b of the tube 18 is just in the vicinity of the unwinding start position 10 c where the copper tube 11 is about to be detached from the outer surface 10 b of the LWC 10. .

  Specifically, as shown in FIG. 5, the tube 18 is formed with a predetermined thickness of 1.0 mm with respect to the copper tube 11, and in the vertical direction from the bottom surface 10 </ b> D of the LWC 10 to the guide lower end 16 a of the guide 16. In the case where the interval is the third vertical interval H3, the tube 18 is formed to have a length equal to or longer than the hypotenuse OL of the right triangle obtained by orthogonally intersecting the coil width direction interval OR1 and the third vertical interval H3 of the LWC 10, and the tube 18 It arrange | positions so that the tube lower end 18b may just become the vicinity of the unwinding start position 10c from which the copper pipe 11 is going to remove | deviate from the outer surface 10b of LWC10.

  As described above, the flanged protection pipe 20 is attached to the LWC 10, the LWC 10 is installed to the guide 16 and the tube 18, and the tube 18 and the guide 16 are pulled upward through the copper tube 11, so that FIG. As shown, the copper tube 11 is detached from the outer side surface 10b of the LWC 10 and once goes radially outward, and then the tube 18 contacts or approaches the flange ring 22 of the flanged protection pipe 20 so that the upper side of the LWC 10 The copper tube 11 is supplied from the LWC 10 by being unwound while rotating around the central axis CL in the direction of the arrow E toward the guide 16 installed at.

By this method, when unwinding the copper tube 11 from the LWC 10, winding tightening can be avoided, and the copper tube 11 can be smoothly supplied from the LWC 10.
More specifically, the LWC 10 obtained by traversing and aligning the copper tubes 11 is placed so that the direction of the central axis CL of the coil body is a vertical direction, and the coil body is placed at a central position above the coil upper surface 10U of the LWC 10. And a guide 16 that allows the insertion of the copper tube 11 is disposed at a position above the guard protection pipe 20 and inside the LWC 10 in a plan view. When unwinding the copper tube 11 from the outermost layer La of the LWC 10 and unwinding the copper tube 11 from the LWC 10 to the innermost layer Lf in order to supply the copper tube 11 from the LWC 10 through the guide 16. Further, it is possible to prevent winding and tightening by the unwound copper tube 11 and to smoothly supply the copper tube 11 from the LWC 10.

  More specifically, by installing a barbed protect pipe 20 fixed to the coil body at a central position above the coil upper surface 10U of the LWC 10, it is unwound from the outermost layer La toward the upper side of the LWC 10, The copper pipe 11 supplied through the guide 16 disposed above the guarded pipe 20 and on the inner side in the plan view of the LWC 10 is guided radially outward by the guarded pipe 20.

  That is, by being guided directly upward of the LWC 10, it is possible to suppress a force from the outside of the LWC 10 toward the central axis CL acting on the unrolled copper tube 11, and the unrolled copper tube 11. Can avoid tightening the outer surface of the LWC 10.

  Therefore, it is possible to avoid the occurrence of defects such as breakage, bending, deformation and scratching of the copper pipe 11 due to the load acting on the copper pipe 11 by tightening of the outer surface of the LWC 10, and the yield and production of the copper pipe 11 Efficiency can be improved significantly.

Further, in the method of unwinding from the outermost layer La, the copper tube 11 is unwound upward, so that the unwinding is performed no matter where the tube end 11a of the outermost layer La is between the upper surface level UL and the lower surface level DL. At this time, the copper tube 11 of the outermost layer La does not slide down, and the occurrence of defects such as breakage, bending, and scratching of the copper tube 11 can be avoided.
As a result, the occurrence of the defect can be avoided by winding and acting on the copper tube 11, so that the yield and production efficiency of the copper tube 11 can be greatly improved.

  Further, the brazed protect pipe 20 is constituted by a columnar body mounted in the inner circumferential space S of the LWC 10, so that it is unwound when the copper tube 11 is unwound from the outermost layer La to the innermost layer Lf of the LWC 10. Further, the tight tightening by the copper pipe 11 can be further prevented, and the copper pipe 11 can be supplied more smoothly from the LWC 10.

  Specifically, the brazed protect pipe 20 is configured by a columnar body that is mounted in the inner circumferential space S of the LWC 10, so that the brazed protect pipe 20 protrudes continuously from the coil upper surface 10U of the LWC 10, and is unrolled copper tube. 11 is unwound from the outermost layer La toward the upper side of the LWC 10 along the side surface of the columnar body, so that a force from the outside of the LWC 10 toward the central axis CL is prevented from acting on the unwound copper tube 11. In addition, it is possible to avoid the unwound copper tube 11 from winding the outer surface of the LWC 10.

  Furthermore, since the flanged protect pipe 20 is formed in a cylindrical shape along the inner side surface 10a constituting the inner circumferential space S, the copper tube 11 is wound from the outermost layer La of the LWC 10 toward the innermost layer Lf. When unwinding, the unwinding of the copper tube 11 can be prevented more reliably, and the copper tube 11 can be supplied more smoothly from the LWC 10.

Specifically, by forming the hooked protection pipe 20 in a cylindrical shape, it can be mounted along the inner side surface 10a constituting the inner circumferential space S of the LWC 10, so that the mounted state is stabilized. The unrolled copper tube 11 is unwound from the outermost layer La toward the upper side of the LWC 10 along the side peripheral surface of the cylindrical body. Therefore, it can suppress that the force which goes to the central axis CL from the outer side of LWC10 acts on the copper tube 11 which is being unwound, and it can avoid that the copper tube 11 being unwound tightens the outer surface of the LWC10.
In addition, by forming the guard pipe 20 with a cylindrical body, it is lighter than a protective pipe formed with a solid columnar body, and the handleability is improved.

  In addition, since there is a flange ring 22 projecting radially outward along the outer peripheral surface in the vicinity of the upper end of the protect pipe body 21 in the flanged protect pipe 20, the inner peripheral space S in which the protect pipe body 21 is mounted is provided. Copper that can be formed larger in diameter than the coil inner diameter ID1, is unwound from the outermost layer La toward the upper side of the LWC 10, and is supplied through a guide 16 that is disposed above the brazed protect pipe 20 and at a position in the plan view of the LWC 10 The tube 11 can be guided further radially outward.

  Therefore, when unwinding the copper tube 11 from the outermost layer La to the innermost layer Lf of the LWC 10, the winding tightness by the unwound copper tube 11 is further reliably prevented, and the copper tube 11 is smoothly supplied from the LWC 10. be able to. In particular, even when the unwinding of the copper tube 11 progresses and the diameter of the LWC 10 is reduced, the unwinding of the unwound copper tube 11 can be further reliably prevented, and the copper tube 11 can be smoothly supplied from the LWC 10. Can do.

  Further, the pipe width direction interval OR2 which is the distance in the width direction from the center of the flanged protect pipe 20 to the outer peripheral edge is set to 300 mm, and the vertical distance from the flanged protect pipe 20 to the guide lower end 16a of the guide 16 Since a certain second vertical interval H2 is 1250 mm and the ratio of the pipe width direction interval OR2 to the second vertical interval H2 is set to 0.24 which is 2 or less, regardless of the second vertical interval H2, By allowing the brazed protect pipe 20 to act on the copper pipe 11 to be unwound, the copper pipe 11 can be reliably guided radially outward, and the copper pipe 11 can be smoothly supplied from the LWC 10.

  Specifically, when the ratio of the pipe width direction interval OR2 to the second vertical direction interval H2 is 2 or more, the copper pipe 11 to be unwound is not in contact with the brazed protect pipe 20, and the copper pipe 11 is sufficiently moved radially outward. In some cases, the guide cannot be guided, and winding by the unwound copper tube 11 may occur. On the other hand, by setting the ratio of the pipe width direction interval OR2 to the second vertical direction interval H2 to 0.24 which is 2 or less, the guide lower end 16a of the guide 16 and the outer peripheral edge of the flanged protect pipe 20 are The angle of tying is 45 degrees or more, and the brazed protect pipe 20 is made to act on the copper pipe 11 to be unwound, so that the copper pipe 11 is reliably guided radially outward, and the copper pipe 11 is smoothly supplied from the LWC 10. Can do.

  Further, the coil width direction interval OR1 which is the distance in the width direction from the center of the LWC 10 to the outer peripheral edge before unwinding is set to 500 mm, and the vertical distance from the coil upper surface 10U of the LWC 10 to the guide lower end 16a of the guide 16 is set. A certain first vertical interval H1 is set to 1500 mm, and the ratio of the coil width direction interval OR1 to the first vertical interval H1 is set to 0.33 which is 4 or less, regardless of the first vertical interval H1. By attaching the protect pipe 20 to the unrolled copper pipe 11, the copper pipe 11 can be surely guided to the outside of the diameter, and the copper pipe 11 can be smoothly supplied from the LWC 10.

  Specifically, when the ratio of the coil width direction interval OR1 to the first vertical direction interval H1 is 4 or more, the winding angle is such that the inclination angle connecting the guide lower end 16a of the guide 16 and the outermost layer La of the LWC 10 is closest to the horizontal direction. In the state before unwinding, the unrolled copper tube 11 does not come into contact with the brazed protect pipe 20, and the copper tube 11 cannot be sufficiently guided radially outward, so that the unrolled copper tube 11 is wound. Tightening may occur. On the other hand, by setting the ratio of the coil width direction interval OR1 to the first vertical direction interval H1 to 0.33 which is 4 or less, the brazed protect pipe 20 is caused to act on the copper tube 11 to be unwound, and the copper The pipe 11 can be reliably guided to the outside of the diameter, and the copper pipe 11 can be smoothly supplied from the LWC 10.

  Further, in the pulling portion where the copper tube 11 is unwound and pulled up, a tube 18 surrounding at least a part from the unwinding start position 10 c where the copper tube 11 is unwound from the outer surface of the LWC 10 to the guide 16. Since the tube 18 is interposed between the copper tube 11 and the brazed protect pipe 20, the copper tube 11 and the side surface of the brazed protect pipe 20 are in direct contact with each other, and the surface of the copper tube 11 is caused by friction. Can be avoided.

  In addition, the coil width direction interval OR1 which is the width direction interval from the center of the LWC 10 to the outer peripheral edge before unwinding is set to 500 mm, and the vertical interval from the bottom surface of the LWC 10 to the guide lower end 16a of the guide 16 3 The vertical interval H3 is set to 1850 mm, the tube 18 is formed to a predetermined thickness of 1.0 mm, and the coil width direction interval OR1 and the third vertical direction interval H3 are orthogonal to the hypotenuse OL of the right triangle. The tube upper end 18a of the tube 18 is connected to the guide lower end 16a of the guide 16, and the tube lower end 18b of the tube 18 is disposed in the vicinity of the unwinding start position 10c. Unwinding start position 10c where the copper tube 11 is about to come off radially outward from the outer side surface, and barbed protection To stabilize the relative position of the tube 18 for type 20 can be guided smoothly by the guide 16 of copper tube 11.

  In addition, by forming the tube 18 to have a length equal to or longer than the hypotenuse OL of the right triangle in which the coil width direction interval OR1 and the third vertical direction interval H3 are orthogonal, the tube 18 has the longest necessary length before unwinding. Even when the lower end of the outermost layer La of the LWC 10 is the starting end of unwinding, the copper tube 11 can be smoothly guided to the guide 16.

  Further, since the tube lower end 18b of the tube 18 is disposed in the vicinity of the unwinding start position 10c where the copper tube 11 is unwound from the outer surface of the LWC 10, the copper tube 11 is easily detached from the outer surface of the LWC 10 radially outward. be able to.

  Specifically, as shown in FIG. 3, the lower surface level DL of the LWC 10 and the lowermost layers of the layers Lb, Ld, and Lf in the layers Lb, Ld, and Lf that unwind the copper tube 11 from the lower surface level DL toward the upper surface level UL. When there is no gap between the copper tube 11 (lower end portion 11d), the copper tube 11 located on the lowermost copper tube 11 and the buffer plate 23 is sandwiched between the buffer plate 23 and the lowermost copper tube 11 from the LWC 10. It becomes difficult to remove.

  However, even in such a case, the tube lower end 18b of the tube 18 can easily remove from the LWC 10 the copper tube 11 at the unwinding start position 10c where the copper tube 11 is about to come out radially. .

  However, even in such a case, by arranging the tube lower end 18b of the tube 18 at the unwinding start position 10c, the copper tube 11 is guided to the outside of the wall thickness of the tube 18, and the copper tube 11 is connected to the LWC 10 The outermost layer La can easily escape to the outside of the diameter, and the copper tube 11 on the outer surface of the LWC 10 and the unrolled copper tube 11 come into contact with each other more reliably, and the above-described defect occurs in the copper tube 11. Can be avoided.

  In addition, since the tube upper end 18a of the tube 18 and the guide lower end 16a of the guide 16 are connected to each other via a bearing 17, when the copper tube 11 is unwound upward from the LWC 10, the tube 18 is the central axis of the coil. It is possible to prevent the tube 18 from being twisted by turning around the CL. Therefore, the copper tube 11 can be stably guided to the guide 16 by the tube 18.

  In addition, since the first vertical interval H1 that is the vertical interval from the coil upper surface 10U of the LWC 10 to the guide lower end 16a of the guide 16 is set to 1850 mm that is 500 mm or more and 2000 mm or less, the outermost layer La from the outermost layer La of the LWC 10 When unwinding the copper tube 11 toward the inner layer Lf, it is possible to more reliably prevent unwinding of the unwound copper tube 11 and supply the copper tube 11 from the LWC 10 more smoothly.

Specifically, if the vertical distance from the coil upper surface 10U of the LWC 10 to the guide lower end 16a of the guide 16 is short, the force directed radially outward becomes strong on the unrolled copper tube 11, and the copper tube 11 is easily separated from the coil. . Therefore, when the copper tube 11 is unrolled, the copper tube 11 is not wound, and defects such as scratches and bending do not occur. In addition, curled wrinkles are also generated uniformly and easily disappear, and the surface of the copper tube 11 is not damaged by rubbing against the guide 16.
On the other hand, when the distance in the vertical direction from the coil upper surface 10U of the LWC 10 to the guide lower end 16a of the guide 16 is too short, which is 500 mm or less, the copper tube 11 is bent too much and is difficult to unwind.

  On the other hand, in the case of 2000 mm or more which is too long in the vertical direction from the coil upper surface 10U of the LWC 10 to the guide lower end 16a of the guide 16, the length of the unrolled copper tube 11 becomes long and the copper tube 11 is unwound. The required tensile force increases, and there is a high possibility that defects such as bending will occur in the copper tube 11, and curling will easily occur.

  On the other hand, when the height of the guide 16 with respect to the coil upper surface 10U of the LWC 10 is set within the above range which is an appropriate height, the copper tube 11 is unwound from the outermost layer La to the innermost layer Lf of the LWC 10. In addition, it is possible to more reliably prevent the unwinding of the copper tube 11 from being unwound and supply the copper tube 11 from the LWC 10 more smoothly.

  In the above description, the hooked protect pipe 20 formed by attaching the hook ring 22 to the upper end of the protect pipe main body 21 is attached to the LWC 10, but the ratio of the pipe width direction interval OR2 to the second vertical direction interval H2 is as follows. If it is set to 2 or less, as shown in FIGS. 8 and 9, the protect pipe 20 a may be configured only by the protect pipe main body 21 to which the collar ring 22 is not attached.

  Even in that case, the ratio of the pipe width direction interval OR2 to the second vertical direction interval H2 is set to 2 or less, and the ratio of the coil width direction interval OR1 to the first vertical direction interval H1 is set to 4 or less, The 1st vertical direction space | interval H1 is set to 500 mm or more and 2000 mm or less.

  Further, the tube 18 is formed with a predetermined thickness, and is formed to have a length equal to or longer than the hypotenuse OL of a right triangle in which the coil width direction interval OR1 and the third vertical direction interval H3 are orthogonal to each other. By connecting the upper end 18a to the guide lower end 16a of the guide 16 and disposing the tube lower end 18b of the tube 18 in the vicinity of the unwinding start position 10c, the protect pipe 20a can The same effect as that of the used unwinding method can be obtained.

  In the above description, the protect pipe main body 21 is made of corrugated cardboard. However, it may be made of plastic such as polyethylene, vinyl chloride or fluororesin as long as the material has a friction coefficient smaller than the friction coefficient of at least the copper tubes 11. .

  Further, although the hooked protect pipe 20 is mounted in the inner circumferential space S, the hooked protect pipe 20 may be mounted inside the winding drum without removing the winding drum of the winding bobbin. Furthermore, although the cylindrical protect pipe main body 21 is used, it may be a solid columnar shape, a polygonal column shape having a square or hexagonal cross section, or a polygonal cylinder shape. However, in the case of the protect pipe main body 21 having a polygonal column shape or a polygonal cylinder shape, it is preferable that the protect pipe body 21 has a substantially polygonal column shape or a substantially polygonal cylinder shape with chamfered corners. Moreover, you may form the part exposed from the coil upper surface 10U of LWC10 among the protect pipe main bodies 21 in the columnar body formed in the inverted truncated cone or the inverted polygonal truncated cone. In this case, since it can be formed larger in diameter than the coil inner diameter ID1 of the inner circumferential space S, even the protect pipe 20a without the collar ring 22 has the same effect as the guarded pipe 20 with the collar ring 22. be able to.

Further, in the case of the hooked protect pipe 20 to which the guard ring 22 is attached, the guard ring 22 and the protect pipe main body 21 may be integrally configured. In the above description, the eaves ring 22 is made of resin. However, the eaves ring 22 may be made of the same corrugated cardboard as the protect pipe main body 21, or may be made of plastic such as polyethylene, vinyl chloride, or fluorine resin.
The tube 18 is made of a resin having a predetermined thickness, but may be made of another material having a small friction coefficient with respect to the copper tube 11 and the brazed protect pipe 20 (protect pipe 20a).

Next, a method for unwinding the LWC 10 will be described with reference to FIGS. 10 to 12 as a method for unwinding using the upper surface flange cover 120 instead of the above-described hooked protection pipe 20.
FIG. 10 is an exploded perspective view of the flange member 121, the cylindrical core member 122, and the buffer plate 23 that are attached to the LWC 10 when the copper tube 11 is unwound from the LWC 10.
FIG. 11 is a perspective view showing an unwinding method using the upper surface flange cover 120, and FIG. 12 is an explanatory perspective view for explaining a state in which the copper tube 11 is unwound from the LWC 10 with the flange member 121 and the tube 18 attached. It is.

  The supply method will be described in detail. In the method of unwinding the copper tube 11 from the outermost layer La of the LWC 10, before unwinding the copper tube 11, as shown in FIG. The LWC 10 is placed on the buffer plate 23 such that the center axis CL of the disc-shaped buffer plate 23 placed on the plate 24 is aligned with the center axis CL of the LWC 10.

  Next, the top flange cover 120 is attached to the LWC 10. The upper surface flange cover 120 includes a flange member 121 and a cylindrical core member 122. The flange member 121 has a flange diameter D3 larger than the coil outer diameter OD1 (see FIG. 1) of the LWC 10, and is formed of a cardboard circular plate material. The cylindrical core member 122 is formed of a cardboard cylindrical body having the same pipe outer diameter OD2 as the coil inner diameter ID1 (see FIG. 1) of the LWC 10 and the same cylinder height h2 as the coil height h1 of the LWC 10. . The upper surface flange cover 120 is mounted by completely fitting the cylindrical core member 122 into the inner circumferential space S along the inner surface 10 a of the LWC 10.

The flange member 121 and the cylindrical core member 122 are integrally configured with their centers aligned. Further, the flange member 121 has a flange projecting portion 121a that protrudes outside the pipe outer diameter OD2 of the cylindrical core member 122 when mounted on the LWC 10, and the side surface of the flange member 121 is the flange side surface 121b. To do.

  Further, in order to eliminate the curl of the pulled up copper tube 11, as shown in FIG. 11, a plastic pipe-like guide 16 is guided from the upper surface level UL of the LWC 10 above the central axis CL of the LWC 10. The first vertical interval H1 that is the vertical interval to the 16 guide lower ends 16a is set to 1850 mm, which is a range from 500 mm to 2000 mm.

  Further, as shown in FIG. 6, the tube 18 is guided to the guide 16 by connecting the tube upper end 18 a of the plastic tube 18 having a small friction coefficient with the copper tube 11 to the guide lower end 16 a of the guide 16 via the bearing 17. It is connected so that it can rotate freely.

  Further, as shown in FIG. 11, the length of the tube 18 is adjusted so that the tube lower end 18b of the tube 18 is just in the vicinity of the unwinding start position 10c where the copper tube 11 is about to come off from the outer surface 10b of the LWC 10. ing.

  As described above, the LWC 10 with the upper surface flange cover 120 attached is disposed at the above-described relative position with respect to the guide 16 and the tube 18, and is pulled upward through the copper tube 11 to the tube 18 and the guide 16, thereby 11 is unwound and supplied.

By this method, when unwinding the copper tube 11 from the LWC 10, it is possible to avoid tightening by the copper tube 11 with respect to the outer surface 10b of the LWC 10, and to smoothly supply the copper tube 11 from the LWC 10.
More specifically, the flange member 121 having a flange diameter D3 larger than the coil outer diameter OD1 of the LWC 10 is fixed at the upper surface level UL of the LWC 10 with their centers aligned with the center axis CL, as shown in FIG. As described above, the copper tube 11 is detached from the outer side surface 10b of the LWC 10, and once goes radially outward, then the tube 18 contacts or approaches the flange side surface 121b of the flange protrusion 121a, and is installed above the LWC 10. The guide 16 is unwound while rotating around the central axis CL in the direction of arrow E.

  Therefore, as shown in FIGS. 11 and 12, a gap is formed between the outer surface 10b of the LWC 10 and the copper tube 11 being unwound, and it is physically determined that the copper tube 11 is guided directly above the LWC 10. Therefore, it is possible to prevent the unwound copper tube 11 from being wound around the outer surface 10b of the LWC 10.

In the method of unwinding from the outermost layer La, the copper tube 11 is unwound upward, so that the tube end 11a of the outermost layer La is unwound regardless of where it is between the upper surface level UL and the lower surface level DL. The copper tube 11 of the outermost layer La does not slide down, and the occurrence of defects such as breakage, bending, and scratching of the copper tube 11 can be avoided.
As a result, the occurrence of the defect can be avoided by winding and acting on the copper tube 11, so that the yield and production efficiency of the copper tube 11 can be greatly improved.

  Also, as shown in FIGS. 11 and 12, the tube lower end 18b of the tube 18 is disposed at the unwinding start position 10c where the copper tube 11 is about to come off from the outer surface 10b of the LWC 10, so that the tube The copper tube 11 can be easily removed from the LWC 10 because the guide is guided to the outer side of the 18th wall thickness.

  In particular, as shown in FIG. 3, in the layers Lb, Ld, and Lf that unwind the copper tube 11 from the bottom to the top, the lower surface level DL of the LWC 10 and the copper tube 11 that becomes the lowest end of the layers Lb, Ld, and Lf ( When there is no gap between the lower end portion 11d), it is difficult to remove from the LWC 10 the lowermost copper tube 11 sandwiched between the copper tube 11 located on the lowermost copper tube 11 and the buffer plate 23 and the lowermost end. It becomes.

  However, even in such a case, the tube lower end 18b of the tube 18 can easily remove from the LWC 10 the copper tube 11 at the unwinding start position 10c where the copper tube 11 is about to come out radially. .

  Further, as shown in FIGS. 11 and 12, there is always a gap between the outer surface 10b of the LWC 10 and the copper tube 11 unrolled by the flange member 121, and the copper tube on the outer surface 10b of the LWC 10 Since all the places where there is a possibility of contact between the unrolled copper tube 11 and the unrolled copper tube 11 are covered with the tube 18, the contact between the outer surface 10 b and the unrolled copper tube 11 damages the copper tube 11. Can be reliably avoided.

  Further, as shown in FIG. 6, by attaching the tube upper end 18 a of the tube 18 to the guide lower end 16 a of the guide 16, the copper tube 11 tends to come off radially outward from the upper surface level UL of the LWC 10 and the outer surface 10 b of the LWC 10. The positional relationship of the tube 18 with respect to the unwinding start portion 10c can be stabilized, and the copper tube 11 can be supplied smoothly.

  Further, as shown in FIG. 6, when the tube upper end 18a of the tube 18 is connected to the guide lower end 16a of the guide 16 via a bearing 17 so as to be rotatable, the copper tube 11 is unwound from the LWC 10. The twist of the tube 18 due to the tube 18 turning around the central axis CL of the LWC 10 can be avoided, and the copper tube 11 can be supplied smoothly.

Further, since the first vertical interval H1 that is the vertical interval of the guide lower end 16a of the guide 16 with respect to the upper surface level UL of the LWC 10 shown in FIG. 11 is optimally set, the copper tube 11 can be supplied smoothly.
More specifically, when the first vertical interval H1 which is the vertical interval between the upper surface level UL of the LWC 10 and the guide lower end 16a of the guide 16 is short, the force toward the radially outward is increased to the copper tube 11 to be unwound, The copper tube 11 is easily separated from the LWC 10. Therefore, when the copper tube 11 is unrolled, the copper tube 11 is not damaged or bent. Further, the curl is also generated uniformly and easily disappears, and the guide 16 is not rubbed and scratched.

On the other hand, when the first vertical interval H1 that is the vertical interval between the upper surface level UL of the LWC 10 and the guide lower end 16a of the guide 16 is too short, which is 500 mm or less, the copper tube 11 is bent too much and is difficult to unwind. .
Therefore, the copper pipe 11 is set by setting the first vertical distance H1 that is the vertical distance from the upper surface level UL of the LWC 10 to the guide lower end 16a of the guide 16 to an appropriate range of 500 mm or more and 2000 mm or less. Can be supplied smoothly.

  Furthermore, since the copper tube 11 is unwound in a state where the cylindrical core member 122 is completely fitted in the inner circumferential space S along the inner side surface 10a of the LWC 10, it is wound around the inner side surface 10a during unwinding. It can prevent that the copper pipe 11 which has stopped collapses.

In the above description, as a method of winding the LWC 10, the winding method in which the number of windings in each layer is the same has been described. However, the number of windings may be different in each layer.
In the above-described embodiment, the corrugated cardboard is used as the flange member 121. However, for example, plastic such as polyethylene, vinyl chloride, or fluororesin may be used.

Further, in the above-described embodiment, a lubricant such as grease may be applied in advance to the flange protrusion 121a in order to make the copper tube 11 unrolled more smoothly.
Further, for example, in the above-described embodiment, the upper surface flange cover 120 composed of the flange member 121 and the cylindrical core member 122 is attached to the LWC 10 immediately before unwinding, but the winding bobbin used at the time of winding is attached to the LWC 10. Even if the copper tube 11 is unwound and supplied by the above method in a state of being attached, the above-described effect can be obtained.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The level wound coil of the present invention corresponds to the LWC 10 of the present embodiment,
The metal tube corresponds to the copper tube 11,
The projecting member and the position fixing body correspond to the flanged protect pipe 20 or the protect pipe 20a.
The top surface position corresponds to the top surface level UL,
The heel corresponds to the heel ring 22,
The fixed body width direction interval corresponds to the pipe width direction interval OR2,
The fixed body vertical interval corresponds to the second vertical interval H2,
The coil width direction interval corresponds to the coil width direction interval OR1.
The coil vertical interval corresponds to the first vertical interval H1,
Although the coil bottom vertical spacing corresponds to the third vertical spacing H3, the present invention is not limited to the configuration of the present embodiment described above, and many embodiments can be obtained.

  For example, in the above-described embodiment, the tube upper end 18a of the tube 18 is inserted into the guide lower end 16a of the guide 16 via the bearing 17 and the guide 16 and the tube 18 are connected. The ends may be connected to each other via the bearing 17, or the bearing 17 may be attached to the outside of the guide lower end 16 a of the guide 16 to connect the tube upper end 18 a of the tube 18.

  In the above description, the LWC 10 formed by winding the copper tube 11 is described. However, not only the copper tube 11 but also a long metal formed of an appropriate metal such as a copper alloy or aluminum or an aluminum alloy, for example. You may comprise with a pipe | tube. Furthermore, in addition to these effects, the same effects as those of the present embodiment described above can be achieved.

10 ... LWC (Level Wound Coil)
10c ... Unwinding start position 10U ... Coil upper surface 11 ... Copper pipe 16 ... Guide 17 ... Bearing 18 ... Tube 20 ... Barbed protect pipe 20a ... Protect pipe 22 ... Bar ring 121 ... Flange member 121a ... Flange protrusion La ... Outermost layer H1 ... 1st vertical direction space | interval H2 ... 2nd vertical direction space | interval H3 ... 3rd vertical direction space | interval OR1 ... Coil width direction space | interval OR2 ... Pipe width direction space | interval S ... Inner peripheral space UL ... Top surface level

Claims (7)

A level wound coil that is traversed and aligned with a metal tube is placed so that the axial direction of the coil body is the vertical direction,
A position fixing body fixed to the coil body is installed at a central position above the upper surface of the level wound coil,
A guide allowing the insertion of the metal tube is disposed above the position fixing body and at a position inside the planar view of the level wound coil,
Unwinding the metal tube upward from the outermost layer of the coil body, and supplying the metal tube from the level-wound coil through the guide ,
In unwound by being pulled pulled portion of the metal tube, comprising a tube surrounding the until the guide from unwinding starting position the metal tube is unwound from the outer surface of the Reberuwaun Dokoiru,
While making the interval in the width direction from the center of the level wound coil to the outer peripheral edge before unwinding the coil width direction,
The spacing of vertical to the lower end of the guide and coil bottom surface vertically apart from the bottom surface of the level-wound coils,
The tube,
While forming the tube with a predetermined thickness,
The coil width direction interval and the coil bottom surface vertical direction interval are orthogonal to each other and formed into a length equal to or longer than the hypotenuse of a right triangle .
The upper end of the tube is rotatably connected to the lower end of the guide via a bearing,
A metal tube supply method , wherein a lower end of the tube is arranged in the vicinity of the unwinding start position . The position fixing body,
The metal pipe supply method according to claim 1 , wherein the metal pipe supply method is configured by a columnar body mounted in an inner circumferential space of the level wound coil. The columnar body,
The metal pipe supply method according to claim 2 , wherein the metal pipe supply method is configured in a cylindrical shape along the inner peripheral surface of the inner peripheral space. Near the upper end of the columnar body,
The metal pipe supply method of Claim 2 or 3 provided with the collar part which protrudes toward a radial direction outer side along an outer peripheral surface. The interval in the width direction from the center of the position fixing body to the outer peripheral edge is set as the interval in the fixing body width direction, and
The vertical distance from the position fixing member to a lower end of the guide and the fixed body vertical spacing of the claims 1 to 4 ratio of the fixed member widthwise spacing relative to the fixed body vertical spacing was 2 or less The metal tube supply method according to any one of the above. While making the interval in the width direction from the center of the level wound coil to the outer peripheral edge before unwinding the coil width direction,
The vertical interval from the upper surface of the level-wound coil to the lower end of the guide is the coil vertical interval,
Metal tube supply method according to any one of claims 1 to 5 and 4 or less the ratio of the coil width direction spacing with respect to the coil vertical interval. The metal pipe supply method according to any one of claims 1 to 6 , wherein an interval in a vertical direction from an upper surface of the level wound coil to a lower end of the guide is set to 500 mm or more and 2000 mm or less.

Images